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A train is traveling up a 4.6° incline at a speed of 3.27 m/s when the last car breaks free and beginsto coast without friction.
(a) How long does it take for the last car tocome to rest momentarily?
in seconds
(b) How far did the last car travel before momentarily coming torest?
in meters
A hollow sphere of inner radius 6.2 cm and outer radius 7.2 cm floats half-submerged in a liquid of density 775 kg/m3. What is the mass of the sphere
Suppose a car's brakes can produce an acceleration of -7 m/s2. what is the minimum distance necessary to stop the car
A conducting sphere 10cm in diameter is first charged and left isolated at a potential of 100volts. calculate the charge (in coulombs) on the sphere and on the capacitor after being connected
During a lunar eclipse, the Moon, Earth, and Sun all lie on the same line, with the Earth between the Moon and the Sun. Calculate the force exerted on the Earth by the Moon
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. a) how much of this charge is on the inner surface of the car? b) how much is on the outer surface of the car?
q1. the brick wall of thermal conductivity 0.91 wmdegrees c of a building has dimensions 2.9 m by 6 m and is 18 cm
The coefficient of performance of a refrigerator is defined as the ratio of heat extracted, At what rate will this refrigerator deliver heat to the room in which it is operating when it is running
If a pendulum has a period of 2.5 son earth, what would be its period in a space station orbitingthe earth, what would be its period in the spcae
A bowling ball of mass 7.1 kg and radius 9.0 cm rolls without slippingdown a lane at 5.2 m/s. Calculate its total kinetic energy
An automobile with 0.200 m radius tires travels 70,000 km before wearing them out. How many revolutions do the tires make
The temperature of a plastic cube is monitored while the cube is pushed2.6 m across a floor at constant speedby a horizontal force of 15 N. What is the increasein the thermal energy of the floor
q1. an audience of 2750 fills a concert hall of volume 35000 m3. if there were no ventilation by how much would
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